65 notecards = 17 pages (4 cards per page)
This is a neuron that has one process that branches into a dendrite and an axon.
a unipolar neuron
This is the most common type of neuron in the bran and spinal cord
This type of neurons that are in the retina of the eye
Sensory neurons that are found in Peripheral Nervous system
This type of neuron has two processes, one dendrite and one axon.
This is the type of neuron found in motor neurons in the peripheral nervous system
Basic parts of all neurons
dentrite, cell body, axon
what are located at the ends of an axon?
this type of neuron has many dendrites & one axon
What connects the neuron to a muslce/gland/another neuron?
synapse (a small space)
Where is the neural impulse created?
Name 5 regions of the spinal cord
Cervical, thoracic, lumbar, sacral, coccygeal
State the number of pairs exiting out of the s
8 cervical, 12 thoracic, 5 lumbar, 5 sacral
True/false motor neurons are located in the ventral root
True/false somatic visceral motor neurons are located in the anterior & lateral grey horns
What kind of nerves does spinal nerve contain.
What are meningi?
Coverings of the brain
What are the 3 meninges that cover the brain?
dura mater, arachnoid, pia mater
What do the Spinal Meninges provide?
Physical support, shock absorption CFS & blood vessels deliver nutrients & oxygen
What kind of tissue is the Arachnoid meningi made up of?
What does the denticulate ligament prevent?
lateral movement of the cord (side-to-side)
in what two spinal regions is the lateral horn found in?
The theracic & Lumbar
Cell bodies of motor neurons are found here
ventral gray horn
This Layer of the spinal cord contains large number sof axons organized in tracts & columbs
What kind of nuclei do the gray horns contain?
somatic & visceral
The location of somatic motor nuclei
anterior gray horn
This location contains visceral motor nuclei
Lateral grey horn.
Where do the cervical enlargements supply nerves to?
shoulder girdles and upper limbs
This layer of the spinal cord contains cell bodies of neurons, neuroglia & unmyelinated axons
where do lumbar enlargements supply nerves to?
pelvis and lower limbs
What is the filum terminale?
slender strand of fibrous tissue, extending from the tip of the concus medullaris, to sacral vertebra providing longitudinal support of the spinal cord
Where does the adult spinal cord extend down to?
down to the second lumbar vertebra
continuation of nerves after the spinal cord that start around the L2 level are called this ___
What is another name for a tract?
What is a tract?
bundle of axons that relay the same type of information (uniform in respect to diameter, mylination & conduction speed
What do Ascending (afferent) tracts carry?
Sensory information toward the brain
What do descending (efferent) tracts carry?
Motor commands to the spinal cord
What two things decussate in the Spinal cord?
both sensory & motor information
How does ascending tracts work?
First order: caries info to periphery from spinal cord where it synapses with 2nd order neuron
Where is sensation first noticed?
False. It is a CNS tissue
False. This is the Epineurium. The Perineurium bundle axons into fascicles
Where is the cervical plexus located?
Where is the brachial plexus located?
Where is the intercostal nerves located?
Where is the lumbar plexus located?
Where is the Sacral plexus located?
What is the major nerve running through the cervical plexus?
What are the Nerves that are found in the brachial plexus?
Radial, ulnar, median, axillary
Largest nerve of the lumbar plexus
Where does the sacral plexus innervate?
Buttocks and lower limb
What nerve branches from the tibial and common fibular nerve?
What is the purpose of reflexes?
To preserve homeostasis by making rapid adjustments in the function of organs
True/False axon sensory neurons sends impluse to the spinal cord by way of ventral root
False. Dorsal root
When you lean on a hot stove & pull your hand away, what kind of reflex is it?
Spinal cord reflex
Steps in a spinal cord reflex
1. arrival of stimulus
Which is NOT an example of a somatic stretch reflect
Which of the following reflexes is NOT an example of somatic reflex?
Corneal reflex. This is a type of Innate reflex